Tl;dr: Customer Support offered me a 30% refund on a new Kindle device when I learned the hard way that my old kindle was no longer being supported by Amazon. Bought new Paperwhite and got told by Customer Service that what I was offered was wrong and to send it back if I want a refund.

Long version:

Since I've started reading again, I thought I'd give e-reading another try since I hadn't used an e-reader in a long time. I dug out my old Kindle Fire (3rd) gen but couldn't remember the pin and when I tried to reset it the "one time code" it texted me was "incorrect" despite me typing in a simple 6 digit code correctly. I get on with the Customer Support chat, who tells me that Amazon discontinued support for my model Kindle. When I expressed frustration, they offered me a 30% refund on the purchase of a new Kindle device. I thought this was too good to be true, so I had them send it to me in an email as back-up in case I got push back (spoiler alert: it didn't help). Naively thinking I'm getting a deal, I purchase a new Paperwhite Signature edition and get it set up and start enjoying it. I emailed support to follow-up and see what the process was for the credit to be applied. First alarm bells went off when I got a phone call (that I didn't answer) and an email right after asking me to talk to an agent to give them additional details as to why the refund was promised. This struck me as odd, because they have all the communications logs but I logged on to chat anyway. The first agent I chatted with told me that the agent that promised the partial refund was incorrect and that she could not offer any more information at that time. When I pressed for more info and asked to be escalated to a supervisor, she disconnected the chat. I responded to the email I received earlier today expressing my profound confusion and was told : "A careful review of your account reflects that the correct information has already been provided. I am sorry to say but we do not have an option to give additional credit on this. You can return the item to get a complete refund on this. I'm unable to offer additional insight on this matter.". A second chat agent confirmed this and told me my options were to keep the Paperwhite as is or return it for a refund.

I understand that I was naive to trust Customer Support, but is there any recourse that I can pursue or am I just shit outta luck?